Microsoft released Rollup 13 for Exchange Server 2007 Service Pack 3. Exchange 2007 is showing it’s age as most of the fixes were already implemented and there is not much to fix. Update Rollup 13 for Exchange Server 2007 SP3 resolves one issue only and that is KB2926397.
- 2926397 An Edge Subscription file from an Exchange 2013 Edge Transport server is rejected by an Exchange 2007 Hub Transport server
In addition with this update new daylight saving time (DST) updates for Exchange Server 2007 SP3 are bundled.
As of now, no issues are reported. In case you have a problem with update you can remove it via Add Remove Programs.
You can get more information on Rollup 13 for Exchange server 2007 Service pack 3 here